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Need a little help. I am trying to run down the part number for the TPS on a 2002 efi vmax and can't seem to find it.
Any help, anyone?
Any help, anyone?
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It says it is obsolete and when I try to cross reference it all the way to 2006 - it still says obsolete. How do I find one?Comment
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Look for someone that is parting out a motor that uses this sensor.
Or, call any of a number of salvage yards that deal in surplus outboard motor parts.
Let Google be your friend, even if the NSA is looking over your shoulder.
That sensor was used on a number of Yam motors. Someone, somewhere, has one they would love to sell to you.Comment
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try a Yamaha dealer, it will give you a superceded number.
never saw a failure on one.
why do you think yours is bad ??Comment
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WOT is off by 500 rpms, yet runs good. Talked to a Yamaha shop that has a Master Technician and he said it is probably one of three things:
1. TPS
2. Oxygen sensor
3. Low Pressure fuel pumps
He said most likely it is not the TPS, but the O2 sensor. He said that 02 sensor failure will cause exactly that kind of rpm loss...because the ecu defaults to a secondary map that richens the fuel mixture and kills WOT.
He also said that if the fuel pumps have not been replaced yet on a 2002 they are way overdue to fail due to the diaphram splitting.
Rodbolt, can you verify what he said to do to test the O2 sensor?
1. Warm the motor up on a hose
2. Take a digital millivolt meter and pierce the gray wire running to the ECU
3. Voltage should be between 300 and 800 mv - and dancing around in that range. He said if it is not dancing - it is bad
Anything else that would do this? Motor runs really good - it has just lost 500 rpms at WOT.Comment
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have you checked on the fuel pumps yet, if they are overdue for failure they wold be the 1st thing I would be checking or just replacing.
You will have to wait for Rodbolt to say something on the O2 test, but I do not think poking a hole in wiring would be something he would recommend and I thought I have read high RPMs were not affected by O2 sensor. but I am not sure on what motorsLast edited by 99yam40; 08-18-2013, 01:37 PM.Comment
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